问题 解答题
直接写出得数
500-197=
15÷
3
4
=
5
7
+
2
7
=
21
4
×
4
7
=
0.02X1000=7.2÷100=
4×12.5%=0.8÷0.7=
3
4
-0.4=
3600÷90=
答案

500-197=303,15÷
3
4
=20,
5
7
+
2
7
=1,
21
4
×
4
7
=3,
0.02×1000=20,7.2÷100=0.072,
4×12.5%=0.5,0.8÷0.7=
8
7
3
4
-0.4=0.35,
3600÷90=40.

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